TM 10-1670-251-12&PC-5. Explanation of Columns (Section IV).a.NationalStockNumber(NSN)Index.(1) Stock number column. This column lists the NSN byNational Item Identification Number (NIIN) sequence.The NIIN consists of the last nine digits of the NSN (i.e.,NSN5305-01-064-1467).NIINWhen using this column to locate an item, ignore thefirst 4 digits of the NSN. However, the complete NSNshould be used when ordering items by stock number.(2) Fig. column. This column lists the number of thefigure where the item is identified/located. The figuresare in numerical order in Section II.(3) Item column. The item number identifies the itemassociated with the figure listed in the adjacent Fig.column. This item is also identified by the NSN listed onthe same line.C-15